I’m getting the “missing a using directive or assembly reference” and no clue what’s going wrong

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You probably don’t have the System.Configuration dll added to the project references. It is not there by default, and you have to add it manually.

Right-click on the References and search for System.Configuration in the .net assemblies.

Check to see if it is in your references…

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Right-click and select Add Reference…

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Find System.Configuration in the list of .Net Assemblies, select it, and click Ok…

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The assembly should now appear in your references…

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